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JEE Advanced Atoms and Nuclei — practice questions — page 3

Explore 88 free Atoms and Nuclei questions in JEE Advanced Physics. Open each question or exercise to read its content, reference answers and available explanation.

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Atoms and Nuclei questions and exercises with answers

Showing questions 61–88 of 88.

Flip and pair: problem with the model that solved itRead the answer and worked solution →Which model does this belong to?Read the answer and worked solution →Bohr's postulatesRead the answer and worked solution →True or false: the nucleusRead the answer and worked solution →Charge and neutralityRead the answer and worked solution →Two are true, one is notRead the answer and worked solution →Tap every problem Bohr's model was built to solveRead the answer and worked solution →Flip and pair: model with its pictureRead the answer and worked solution →Strength or weakness?Read the answer and worked solution →Reading the models backRead the answer and worked solution →Assertion and reason: modelsRead the answer and worked solution →True or false: line spectraRead the answer and worked solution →Bohr's postulate quantises the angular momentum of an electron in a stationary orbit asRead the answer and worked solution →Which spectral series of hydrogen lies in the visible region of the electromagnetic spectrum?Read the answer and worked solution →Explained, or left unexplained?Read the answer and worked solution →Assertion and reasonRead the answer and worked solution →Two are true, one is notRead the answer and worked solution →The ratio of the longest wavelength in the Lyman series to the longest wavelength in the Balmer series of hydrogen isRead the answer and worked solution →Match each physical constant to its value.Read the answer and worked solution →Match each physical constant to its value.Read the answer and worked solution →Order the argument: why Rutherford's atom should collapseRead the answer and worked solution →True or false: Rutherford's two difficultiesRead the answer and worked solution →Spot the one that does not belongRead the answer and worked solution →Order the atomic models in this chapterRead the answer and worked solution →Spot the one that does not belongRead the answer and worked solution →Complete Bohr's first postulateRead the answer and worked solution →The radius of the $n$th Bohr orbit in a hydrogen-like atom of nuclear charge $Z$ scales asRead the answer and worked solution →The de Broglie wavelength $\lambda$ of an electron in the $n$th Bohr orbit of hydrogen, in terms of the orbit radius $r_n$, isRead the answer and worked solution →

Worked practice questions

Flip and pair: problem with the model that solved it

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Matching pairs
  1. A
    Scattering results
    B
    Rutherford
  2. A
    Atomic stability
    B
    Bohr
  3. A
    Line spectra
    B
    Bohr
  4. A
    Electrons in a positive cloud
    B
    Thomson
Each failure drove the next model. Source: syllabus Physics, Ch 12 Atoms.

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Which model does this belong to?

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Items
  1. Item
    Electrons embedded in positive charge
    Category
    Thomson
  2. Item
    A spherical cloud of positive charge
    Category
    Thomson
  3. Item
    A tiny dense nucleus
    Category
    Rutherford
  4. Item
    Electrons revolve around the nucleus
    Category
    Rutherford
  5. Item
    Stationary orbits with no radiation
    Category
    Bohr
  6. Item
    Three postulates for hydrogenic atoms
    Category
    Bohr
Categories
  1. Item
    Thomson
  2. Item
    Rutherford
  3. Item
    Bohr
Three pictures of where the charge sits. Source: syllabus Physics, Ch 12 Atoms.

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Bohr's postulates

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Questions
  1. Question
    In a stationary orbit the electron
    Choices
    1. radiates continuously
    2. is at rest
    3. does not radiate energy
    Correct choice
    does not radiate energy
  2. Question
    Bohr's postulates were framed for
    Choices
    1. hydrogenic atoms
    2. all molecules
    3. solids
    Correct choice
    hydrogenic atoms
  3. Question
    Bohr's model was built to explain
    Choices
    1. chemical bonding
    2. line spectra and stability
    3. radioactivity
    Correct choice
    line spectra and stability
  4. Question
    Bohr's second postulate concerns the electron's
    Choices
    1. mass
    2. charge
    3. angular momentum
    Correct choice
    angular momentum
Three postulates, laying the foundation of quantum mechanics. Source: syllabus Physics, Ch 12 Atoms.

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